Nice examples! The two outer ones are 37x263B for the WW2 German Flak 18/36/37/43 and the BK 3,7 anti-tank gun carried by the Ju 87G aircraft. The central one is the 37x223R for the US tank/anti-tank gun (equivalent to the British 2 pounder anti-tank).
You'll find more examples on the Ammo Photo Gallery on my website, here:
http://quarryhs.co.uk/tankammo.html